The 5th episode of the most famous arcade-shooting-series comes bringing the unaltered classic gameplay, a new weapon, 6 new vehicles as well as 2 new soldiers for the pantheon. The most notable introduction to the series is the Metalish System, giving to the player a new possibility to score more points: after pick up certain shield-shape emblems, a timer bar will be displayed at the top of the screen. During this time, you must to shoot rapidly as many enemies as possible and, depending on your acting, you will receive a corresponding badge bonus that will be added to your score after completing it. When you die, the bonus wears off.